MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef4bda77b3391e7d6a36a1d927fc81b1499c36f3d65322ed5f274a3742e07ebe. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


QuirkyLoader


Vendor detections: 11


Intelligence 11 IOCs YARA 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef4bda77b3391e7d6a36a1d927fc81b1499c36f3d65322ed5f274a3742e07ebe
SHA3-384 hash: 9fdfe49d88fa45472404f2ce4706c713adfc780008782d868fd10e7a3b85cd9bc5874e33b1826fc2980f3df7a4fe4bb7
SHA1 hash: 295e39eae4899b72ddba38bfe52dbc6640c6433e
MD5 hash: 50c66833facf937641edf9c471854ad8
humanhash: timing-south-harry-island
File name:libpsl-5.dll
Download: download sample
Signature QuirkyLoader
Create hunting rule
File size:4'048'896 bytes
First seen:2026-03-18 14:02:25 UTC
Last seen:2026-03-18 14:58:55 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 2ecf0f36b78ff6ae7f4aa3f199a901cf (1 x QuirkyLoader)
ssdeep 98304:hfGlkMNOHOQ7bKgNAxIr9RDLwZt5cG/2I2Ua7bDf2s27fEvgylxBc/ssTUrp:hfGl1NgnbK2rTDcZC//27SXxussTU
TLSH T19C16BE55E3C829E9D417CA388744E333C2B2B9634B76D08B5A9AD7061F779624F3FA40
TrID 70.9% (.EXE) InstallShield setup (43053/19/16)
10.7% (.EXE) Win64 Executable (generic) (6522/11/2)
8.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
3.3% (.EXE) OS/2 Executable (generic) (2029/13)
3.3% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
Reporter JAMESWT_WT
Tags:booking ClickFix exe FakeCaptcha QuirkyLoader

Intelligence

File Origin
# of uploads :
2
# of downloads :
121
Origin country :
IT IT
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
_ef4bda77b3391e7d6a36a1d927fc81b1499c36f3d65322ed5f274a3742e07ebe.dll
Verdict:
No threats detected
Analysis date:
2026-03-18 14:03:19 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/20d0b98a-bbf7-44e3-a1d5-43260a0d9fb3

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/57989/
Verdict:
Malicious
Score:
81.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69bab0a693b644ca466b4fdc
Tags:
emotet
Result
Verdict:
Clean
Maliciousness:
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
masquerade microsoft_visual_cc packed
Link:
https://www.filescan.io/uploads/69bab0a92000fc76c3e99437/reports/fde7d1c8-eb20-4c79-ac42-1033e9e17c2a/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/ef4bda77b3391e7d6a36a1d927fc81b1499c36f3d65322ed5f274a3742e07ebe
Result
Gathering data
Verdict:
Malicious
File Type:
dll x64
Detections:
HEUR:Trojan.Win64.Convagent.gen HEUR:Trojan.Win64.Generic
Link:
https://opentip.kaspersky.com/ef4bda77b3391e7d6a36a1d927fc81b1499c36f3d65322ed5f274a3742e07ebe/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/05fa85d4-dfbb-4023-ac8f-2b87ff51ac5e
Score:
92%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/ef4bda77b3391e7d6a36a1d927fc81b1499c36f3d65322ed5f274a3742e07ebe
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ef4bda77b3391e7d6a36a1d927fc81b1499c36f3d65322ed5f274a3742e07ebe/
Verdict:
Malicious
Threat:
Trojan.Win64.Convagent
Link:
https://tip.neiki.dev/file/ef4bda77b3391e7d6a36a1d927fc81b1499c36f3d65322ed5f274a3742e07ebe
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=55f5u55theph22rwuhmsp7ebwfezynxt2zjsf3k7e5fdoqxap27a._file
Result
Malware family:
n/a
Score:
  3/10
Tags:
n/a
Link:
https://tria.ge/reports/260318-rctkdaa12s/
Unpacked files
SH256 hash:
ef4bda77b3391e7d6a36a1d927fc81b1499c36f3d65322ed5f274a3742e07ebe
MD5 hash:
50c66833facf937641edf9c471854ad8
SHA1 hash:
295e39eae4899b72ddba38bfe52dbc6640c6433e
Detections:
win_quirkyloader_auto
Create hunting rule
Link:
https://www.unpac.me/results/5dfd5ff8-698e-4c84-893a-86d7063d9d1f/
Malware family:
QuirkyLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ef4bda77b339/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/ef4bda77b3391e7d6a36a1d927fc81b1499c36f3d65322ed5f274a3742e07ebe

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__MemoryWorkingSet
Create hunting rule
Author:Fernando Mercês
Description:Anti-debug process memory working set size check
Reference:http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE
Create hunting rule
Author:CYFARE
Description:Detects Windows malware employing anti-VM / anti-sandbox evasion techniques across VMware, VirtualBox, Hyper-V, QEMU, Xen, and generic sandbox environments
Reference:https://cyfare.net/
Rule name:win_quirkyloader_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.quirkyloader.

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Cape
Cape
https://www.capesandbox.com/analysis/57989/

Comments